Purchasing TV in Japan

We are moving to Kobe this September. I have heard that TVs are very expensive there so are considering buying one and taking it with us. But, does anyone know how much a typical TV of about 20-24 inches costs at Costco in Japan?

You don't say where you are from!! The type of TV you buy in your home country will have a big impact on whether it will work in Japan.
e.g.
PAL or NTSC ?
100V/120V/220V/240V ?
Digital or analog TV system ?

Do you intend to watch only Japanese broadcast TV, or will you use satellite TV such as Sky Perfect, for some English language content?

Also, what do you regard as expensive?

Yodobashi cameras--They have huge stores in big towns sell fairly big TVs from
16 000 to 25 000 Yens. Not a bad price at all .

In addition to what Monkey See said, some places have a "Time Service" where they offer tvs for a special price on say, Sunday, for an hour or so.

There's also one other thing you can do. If you are not intending to watch Japanese broadcast TV, but watch DVD/BluRay, and Satellite TV, then you can buy a modern computer monitor. They usually have computer VGA input, HDMI (High Definition TV) and A/V inputs. You can then use it just like a TV, but with external components.
They are also cheaper than TVs. I bought a 27" monitor with all of those inputs for only 22,000 yen.

Panasonic, sharp, Sony recorded a huge operating loss this fiscal year due to intensive competition in TV market, which means it's a buyer's market.